◉ Official answer
🎯 Comment Trouble (General · Level 1 · +50 XP)
A community guestbook reflects user-submitted feedback directly into the HTML response without context-aware output encoding, exposing visitors to reflected XSS.
Learning & Defense Goals:
🎯 Launch Isolated Sandbox on Cyber Lab →
Community Discussion Rules: Discuss methodologies, discovery tactics, and architectural hardening. Please do not post raw flags directly. Share your production remediation code!